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Response of Norway spruce root system to elevated atmospheric CO2 concentration
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SYSNO ASEP 0396692 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Response of Norway spruce root system to elevated atmospheric CO2 concentration Author(s) Pokorný, Radek (UEK-B) RID, ORCID, SAI
Tomášková, I. (CZ)
Marek, Michal V. (UEK-B) RID, ORCID, SAISource Title Acta Physiologiae Plantarum. - : Springer - ISSN 0137-5881
Roč. 35, č. 6 (2013), s. 1807-1816Number of pages 10 s. Language eng - English Country PL - Poland Keywords biomass ; elevated CO2 ; Picea abies ; root structure ; secondary roots Subject RIV EH - Ecology, Behaviour R&D Projects ED1.1.00/02.0073 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) SP/2D1/70/08 GA MŽP - Ministry of Environment (MŽP) SP/2D1/93/07 GA MŽP - Ministry of Environment (MŽP) Institutional support RVO:67179843 - RVO:67179843 UT WOS 000319164500007 DOI 10.1007/s11738-013-1218-9 Annotation Root structure parameters, root biomass and allometric relationships between above- and belowground biomass were investigated in young Norway spruce (Picea abies [L.] Karst.) trees cultivated inside the glass domes with ambient (AC, 375 mu mol(CO2) mol(-1)) and elevated (EC, A + 375 mu mol(CO2) mol(-1)) atmospheric CO2 concentrations ([CO2]). After 8 years of fumigation, a mean EC tree in comparison with AC one exhibited about 37 % higher belowground biomass. The growth of primary root structure was unaffected by elevated [CO2]; however, the biomass of secondary roots growing on the primary root structure and the biomass of secondary roots growing in the zone between the soil surface and the first primary root ramification were significantly higher in EC comparing with AC treatment about 58 and 70 %, respectively. The finest root's (diameter up to 1 mm) biomass as well as length and surface area of both primary and secondary root structures showed the highest difference between the treatments; advancing EC to AC by 43 % on average. Therefore, Norway spruce trees cultivated under well-watered and rather nitrogen-poor soil conditions responded to the air elevated [CO2] environment by the enhancement of the secondary root structure increment, by enlargement of root length and root absorbing area, and also by alternation of root to aboveground organ biomass proportion. Higher root to leaf and root to stem basal area ratios could be beneficial for Norway spruce trees to survive periods with limited soil water availability. Workplace Global Change Research Institute Contact Nikola Šviková, svikova.n@czechglobe.cz, Tel.: 511 192 268 Year of Publishing 2014
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